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diff -up bash-4.1/sig.h.signal bash-4.1/sig.h
--- bash-4.1/sig.h.signal 2009-01-04 20:32:41.000000000 +0100
+++ bash-4.1/sig.h 2012-08-28 11:19:14.920224571 +0200
@@ -96,6 +96,8 @@ do { \
sigprocmask (SIG_BLOCK, &nvar, &ovar); \
} while (0)
+#define UNBLOCK_SIGNAL(ovar) sigprocmask (SIG_SETMASK, &ovar, (sigset_t *)NULL)
+
#if defined (HAVE_POSIX_SIGNALS)
# define BLOCK_CHILD(nvar, ovar) \
BLOCK_SIGNAL (SIGCHLD, nvar, ovar)
diff -up bash-4.1/trap.c.signal bash-4.1/trap.c
--- bash-4.1/trap.c.signal 2009-10-10 23:21:44.000000000 +0200
+++ bash-4.1/trap.c 2012-08-28 10:58:14.746345797 +0200
@@ -516,6 +516,8 @@ set_signal (sig, string)
int sig;
char *string;
{
+ sigset_t set, oset;
+
if (SPECIAL_TRAP (sig))
{
change_signal (sig, savestring (string));
@@ -546,9 +548,10 @@ set_signal (sig, string)
environment in which it is safe to do so. */
if ((sigmodes[sig] & SIG_NO_TRAP) == 0)
{
- set_signal_handler (sig, SIG_IGN);
+ BLOCK_SIGNAL (sig, set, oset);
change_signal (sig, savestring (string));
set_signal_handler (sig, trap_handler);
+ UNBLOCK_SIGNAL (oset);
}
else
change_signal (sig, savestring (string));